PECAM1 and bilateral striopallidodentate calcinosis: Histopathology and light microscopy of skin biopsy from 20 PFBC, 7 HC and 10 PD subjects (3 mm ø–5 mm deep punch biopsies, Hematoxylin–Eosin and vonKossa staining, immunoperoxidase CD31 staining); clinical, genetic and radiological assessment.